Answer: c. regulates the secretory activity of the pituitary gland.
Explanation:
The hypothalamus can be defined as a small part of the brain that is located at the base of the brain. It has two functions in the human body, first releasing hormones and maintaining homeostasis.
The hypothalamus is responsible for linking the endocrine system to the brain through the pituitary gland. It stimulates the secretion and inhibition of the hormones from the anterior pituitary.
The correct answer is D) The codon AUG must be identified.
What must occur for protein translation to begin is that the codon AUG must be identified.
The process starts when the 5AUG or start codon is identified. In the polypeptide chain, the 5AUG is the first amino acid. We are talking about Transition, the process when the genetic code in an RNA molecule has to be decoded in a polypeptide chain in order to deliver an amino acid sequence. In this complex transition system, there are important components included such as ribosomes, transfer RNA, and mRNA.
Answer:
Excitation is the process in which action potentials in the nerve fiber lead to action potentials in the muscle fiber. There is then a rapid fluctuation in membrane voltage at the motor end plate, called the end-plate potential. Areas of the sarcolemma near the motor plate have gates that open, moving ions, which causes the action potential that excites the muscle fiber. The process begins with a nerve signal stimulating a voltage-gated calcium ion channel to open, allowing the ions to enter the axon terminal. The ions stimulate the release of acetylcholine into the synaptic cleft.
A Triassic extinction is a boundary between the Triassic<span> and Jurassic periods, 201.3 million years ago, and is one of the major </span>extinction<span>events of the Phanerozoic eon, profoundly affecting life on land and in the oceans.</span>
Answer:
The correct match is given below:
Explanation:
- The condition of having gametes similar in shape, but different in size – anisogametes.
- The condition of having anisogametes - anisogamy
- The part of the stamen of a flower that bears the pollen – anther
- An organ in simpler plants that produces sperm cells – antheridium
- An organ in lower vascular plants, gymnosperms, mosses, and liverworts which produces an egg cell - archegonium
- A reproductive organ of gymnosperms having a central axis with radiate scales and bracts; can either produce pollen or ovules – cone
- An act of fertilization involving the transfer of cell contents to another cell; usually occurs in simpler organisms – conjugation
- A large gamete with stored food - Egg
- A long, whip-like structure extending from a cell used for locomotion- Flagellum
- An organ of lower plants, some protists and some fungi that produces gametes - gametangium
- Gamete producing organs in animals – gonads
- Cone-bearing plant; often called evergreen – Gymnospers
- Incapable of independent movement - immotile
- Gametes that are the same in size and shape - isogametes
- Capable of independent movement- motile
